Natural Overcalls of 1 NT
Bidding over 1NT Opening
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Definitions:
- Weak NT opener:
- minimum range less than or equal to 13 HCPs
- Strong NT opener:
- minimum range greater than or equal to 14 HCPs
Sequences:
| OP: | OC: | Description |
| 1NT | 2C/D/H/S |
1 suited overcall |
| 1NT | 2NT | 2 Minor suit overcall |
| 1NT | 3C/D/H/S |
1 suited preempt |
| 1NT | double | penalty |
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Over Weak NT:
| Overcaller Bids
| Description
| Value
|
| OC:double
| semi-balanced with source of tricks
| 13+ HCPs (nominally)
|
| OC:2C/D/H/S
| (5)6+ cards, good suit
| (10)13+ pts (nominally)
|
| OC:2NT
| 5+ clubs, 5+ diamonds
| 6-7 (non-vul) or 7-8 (vul) tricks
|
| OC:3C/D/H/S
| (5)6+ cards, good suit
| 6-7 (non-vul) or 7-8 (vul) tricks
|
Over Strong NT:
| Overcaller Bids
| Description
| Value
|
| OC:double
| semi-balanced with source of 7 tricks
| 15+ HCPs (nominally)
|
| OC:2C/D/H/S
| (5)6+ cards, good suit
| 5-6 (non-vul) or 6-7 (vul) tricks
|
| OC:2NT
| 5+ clubs, 5+ diamonds
| 5-6 (non-vul) or 6-7 (vul) tricks
|
| OC:3C/D/H/S
| (5)6+ cards, good suit
| 6-7 (non-vul) or 7-8 (vul) tricks
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